Liberal Version:
The safety and wellbeing of children who attend unregistered schools are being put at risk from according to the chief inspector of schools.
People who had not been cleared to work with children have been found teaching pupils in "unhygienic and filthy" conditions as well as at locations with fire hazards.
Ofsted chief Sir Michael Wilshaw has been working to close down illegal, unregistered schools in the UK.
He wrote a letter to the Education Secretary Nicky Morgan, which has been published by the Daily Mail: "This sends out an entirely wrong message of what the DFE perceives to be acceptable practice. Indeed, it could have the unintended consequence of encouraging others to open such schools."
He has called for an "urgent" review of the DFE's (Department for Education) protocols in order to stamp down illegal institutions.
Mr Wilshaw continued in his letter: "I remain concerned that the number of children being educated in unregistered schools in parts of the country is far higher than is currently known by local authorities or the DfE.
"Ofsted's work to ensure that all maintained and independent schools promote British values is being seriously undermined by the growth of these settings."
A DFE spokesman said: "Since 2010, we have taken robust steps to tackle unregistered schools and improve safeguarding and this includes being completely clear it is a criminal offence to operate an unregistered independent school.
"We agree with Ofsted that more needs to be done and will be strengthening our communications to potential providers.
"We are also introducing further powers to regulate settings which teach children intensively and to intervene and impose sanctions where there are safety or welfare concerns.
"We are pleased Ofsted has agreed to take forward these prosecutions and we look forward to immediate progress."